BalancedForce For Cleaner Bass | MartinLogan 210, 212 instruction

MartinLogan Exclusives

English

BalancedForce™ For Cleaner Bass

Resulting from an equal and opposite reaction to the cone's movement, strong bass causes all traditional subwoofer enclosures to generate acoustic vibrations. You feel this by touching the cabinet. Although the "physics" of this phenomenon actually cause a subwoofer cabinet to resonate or even dance, most subwoofer designers apply weight or mass to the cabinet to minimize such disturbances, but still leave one byproduct—"smeared bass". Vibrations translated from the woofer to the cabinet actually alter the bass causing a loose and "fuzzy" sound.

This subwoofer uses a BalancedForce bass configuration to nullify cabinet vibrations. Originally engineered for our cost-no- object, state-of-the-art Statement™ E2 system, BalancedForce uses drivers mounted at opposing angles. Your subwoofers drivers, spaced 180 degrees apart, operate in exact opposition, result- ing in maximum cancellation delivering the ideal—pure bass energy with a reduction in cabinet contributions to the room as high as 25dB over traditional subwoofer resonance solutions!

25Hz Level Control

25Hz Level control allows custom sound tailoring capability found in few subwoofers. A room, especially when small, can greatly exaggerate bass. The 25Hz Level control knob increases or decreases lower bass to compensate for these room anomalies and allows increased deep bass if you desire a sense of subsonic energy at the lowest frequencies.

PBK (Perfect Bass Kit)

Although the controls on your subwoofer allow you to fine tune and optimize bass performance in your room, PBK allows you to also correct for the negative effects of the room itself. Even when a subwoofer is perfectly positioned, the room can have a dramatic impact on bass performance. Room dimensions, dead spots, archways, furniture, and countless other factors can turn a room into an additional instrument playing alongside musicians or movie scores with unwanted contributions of coloration and resonance. PBK is sold separately and is strongly recommended.

Proprietary Switching Amplifiers

BalancedForce subs match powerful proprietary switching amps with incredible woofer drivers resulting in tightly defined bass while keeping distortion at the lowest possible levels. The BalancedForce 210 features an 850 watt Class D switching amplifier capable of a 1700 watt dynamic peak operating at over 90% efficiency. BalancedForce 212 features dual 850 watt amplifiers (one for each woofer) with a total system power of 1700 watts (3400 watts dynamic peak).

Low-noise, high-power transformers and switching power sup- plies feature high-quality MOSFET transistors, noise-suppression networks, and control circuitry to provide tremendous levels of current with extremely low levels of distortion. Split power supply rails minimize distortion while maximizing switching efficiency. Military grade glass epoxy circuit boards, temperature sensors, and protection circuitry guarantee quality sound and reliable trouble-free operation.

Optional Custom Low-Pass Filters

Seamless blending between a subwoofer and full-range loud- speaker is, at the best of times, challenging—and when you're dealing with the highest levels of loudspeaker performance there is no room for error. The addition of a custom low-pass filter takes the headache out of achieving superb low-frequency performance.

Custom low-pass filters are specifically designed to optimize subwoofer integration by precisely matching the low-frequency roll off of specific loudspeaker models. Once a custom low-pass filter is uploaded to a subwoofer, setup is only a matter of adjusting the phase and level. This custom filter is applied only to the left and right inputs of your subwoofer. The sub's LFE input remains unfiltered, which allows surround preamp/processors to send low- frequency information for the center, surround, and LFE channels without compromising the performance of your main speakers.

36 MartinLogan Exclusives